Genuine OEM Lexus Coolant Pipe Gasket, part number 1634736020. This gasket is essential for sealing connections within the engine's coolant pipe system, effectively preventing leaks and maintaining proper coolant pressure. It is positioned at the junction of coolant pipes. Manufactured from durable, heat-resistant material, it ensures a reliable and long-lasting seal. Genuine OEM gaskets are critical for coolant pipes to provide the exact sealing surface and material properties required to withstand high temperatures and pressures.